I just bought Halo and just my luck, the game is having problems on my system. When I power up for the first time its fine but if I play split screen or Co-op mode, after the first game we play the screen freezes the next time I go to play again. Then the system resets and says that the disc is dirty and the system cant read the disc. Also if i do get it to play then the first player controller ends up having some autofire on and my gun just keeps shooting until i pull out the controller and insert it again. I bought my system brand new about 8 months ago. I ended up even exchanging Halo b/c I thought it was the game but the same thing happens with the new game. Anyone have this happen to them before?